# Introduction To Physical Science

## Chapter 6: Atomic Structure and Chemical Bonds

### Section 1 Self-Check Quiz-Eng.

 1 Most of an atom's mass is contained in __________. Need a Hint? A) the electron orbits B) its nucleus C) the electron cloud D) its outer energy shell 2 What is one difference between satellites and electrons? Need a Hint? A) You can calculate exactly where an electron will be at any time. A satellite's position must be estimated. B) Satellites have positive electrical charges. Electrons have negative charges. C) You can calculate exactly where a satellite will be at any time. An electron's position must be estimated. D) Satellites have a larger negative charge than electrons. 3 The atomic number of calcium is 20. How many protons does a calcium atom contain? Need a Hint? A) 10 B) 40 C) 0 D) 20 4 A chlorine atom has 17 protons and 18 neutrons. How many electrons does it have? Need a Hint? A) 18 B) 35 C) 1 D) 17 5 The __________ an energy level is from the nucleus, the __________ electrons it can hold. Need a Hint? A) farther, more B) farther, fewer C) closer, more D) farther, more tightly bound 6 Electrons in the sphere closest to the nucleus are in the __________ energy level. Need a Hint? A) highest B) lowest C) middle D) negative 7 How many electrons does an atom of carbon have in its outer energy level? Need a Hint? A) 6 B) 8 C) 4 D) 12 8 What do lithium, sodium, and potassium have in common? Need a Hint? A) They are all metalloids. B) They all have two electrons in their outer energy levels. C) They are all nonmetals. D) They are all Group I elements. 9 The first version of the periodic table of the elements was created by __________. Need a Hint? A) Mendel B) Mendeleev C) Mendelssohn D) Minsk 10 Which of the following is NOT true of the elements in Group 18? Need a Hint? A) They are all metalloids. B) Their outer energy levels are complete. C) They include the noble gases. D) They are all nonmetals. 11 A(n) __________ is a force that holds two atoms together. Need a Hint? A) isotope B) chemical compound C) chemical bond D) ion 12 A(n) __________ is a method of representing atoms and the electrons in their outer energy levels. Need a Hint? A) electron dot diagram B) chemical symbol C) chemical formula D) chemical equation 13 What do atoms of boron and aluminum have in common? Need a Hint? A) They are metals. B) They are metalloids. C) They have the same number of neutrons in their nuclei. D) They have three electrons in their outer energy levels.